From: Alexander Bulekov Date: Thu, 27 Apr 2023 21:10:13 +0000 (-0400) Subject: apic: disable reentrancy detection for apic-msi X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=50795ee051a342c681a9b45671c552fbd6274db8;p=qmiga%2Fqemu.git apic: disable reentrancy detection for apic-msi As the code is designed for re-entrant calls to apic-msi, mark apic-msi as reentrancy-safe. Signed-off-by: Alexander Bulekov Reviewed-by: Darren Kenny Message-Id: <20230427211013.2994127-9-alxndr@bu.edu> Signed-off-by: Thomas Huth --- diff --git a/hw/intc/apic.c b/hw/intc/apic.c index 20b5a94073..ac3d47d231 100644 --- a/hw/intc/apic.c +++ b/hw/intc/apic.c @@ -885,6 +885,13 @@ static void apic_realize(DeviceState *dev, Error **errp) memory_region_init_io(&s->io_memory, OBJECT(s), &apic_io_ops, s, "apic-msi", APIC_SPACE_SIZE); + /* + * apic-msi's apic_mem_write can call into ioapic_eoi_broadcast, which can + * write back to apic-msi. As such mark the apic-msi region re-entrancy + * safe. + */ + s->io_memory.disable_reentrancy_guard = true; + s->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, apic_timer, s); local_apics[s->id] = s;